The PAiA modules have four different power connections, V+, V-, G (power ground), and SG (signal ground) and the MFOS dual VCA only has V+, V- and G (common ground). Right now I have the MFOS module's ground hooked up to the PAiA unit's G (power ground) but not the SG (signal ground), what should I be doing differently to get rid of this hum?

The PAiA modules have four different power connections, V+, V-, G (power ground), and SG (signal ground) and the MFOS dual VCA only has V+, V- and G (common ground). Right now I have the MFOS module's ground hooked up to the PAiA unit's G (power ground) but not the SG (signal ground), what should I be doing differently to get rid of this hum?

This may be a stupid question, but what are you using to open the VCA? Did you patch the AR envelope to it from the Paia VCO? I just patched that and I do not hear any thump. With the attack pot all the way down, the attack is sharp, but definitely not a thump.

Peter
Edit: OK, I just re-read your post, and see that you are using the AR env in the Paia VCO. Have you tried contacting Scott at Paia? He is very helpful, and your best bet to resolve this.

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